Re: [libvirt] Rudimentary (basic) s390x architecture functions for libvirt

> On Tue, Jan 25, 2011 at 08:34:03PM +0100, Patrick Siegl wrote: >> A few more details for s390x: why you can't set param '-S' and need >> '-chardev vc,id=cons -device virtio-serial-s390 -device >> virtconsole,chardev=cons' on s390x: >> >> 1) qemu-system-s390x -M s390-virtio -vnc :0 -enable-kvm -smp 1 -m 1024 >> -k de -kernel /boot/image-2.6.34-tue01 -initrd >> /boot/initrd-2.6.34-tue01_GUEST -drive file=/data/sle11.img -append >> "root=/dev/vda1 rw" >> >> => screenshot 1 >> >> 2) qemu-system-s390x -S -M s390-virtio -vnc :0 -enable-kvm -smp 1 -m >> 1024 -k de -kernel /boot/image-2.6.34-tue01 -initrd >> /boot/initrd-2.6.34-tue01_GUEST -drive file=/data/sle11.img -append >> "root=/dev/vda1 rw" >> >> => screenshot 2 >> 3) qemu-system-s390x -M s390-virtio -vnc :0 -enable-kvm -smp 1 -m 1024 >> -k de -kernel /boot/image-2.6.34-tue01 -initrd >> /boot/initrd-2.6.34-tue01_GUEST -drive file=/data/sle11.img -append >> "root=/dev/vda1 rw" -chardev vc,id=cons -device virtio-serial-s390 >> -device virtconsole,chardev=cons >> >> => RUN >> >> 4) qemu-system-s390x -S -M s390-virtio -vnc :0 -enable-kvm -smp 1 -m >> 1024 -k de -kernel /boot/image-2.6.34-tue01 -initrd >> /boot/initrd-2.6.34-tue01_GUEST -drive file=/data/sle11.img -append >> "root=/dev/vda1 rw" -chardev vc,id=cons -device virtio-serial-s390 >> -device virtconsole,chardev=cons >> >> => screenshot 4 > These screenshots are all showing the same thing, but for different > reasons. > > IIUC, there is no 'VGA' graphics adapter in s390 world, hence > you need some form of text console. This is what virtio-serial-s390 > is providing for you. This does not need to be hardcoded in the > QEMU arg generator. You can set this in the XML > > <console type='vc'> > <target type='virtio'/> > </console> > > When you add the '-S' argument this tells QEMU to launch the binary > but *NOT* run the guest. When libvirt uses '-S', it launches QEMU > runs some monitor commands, and then runs 'cont' to start the > guest running. When you're running QEMU manually in your demo > above, I assume you never told QEMU to start the CPUs, hence you > see the screenshot 4. If you had issued 'cont' on the monitor it > would run normally as per example 3. > > Regards, > Daniel -- libvir-list mailing list libvir-list(a)redhat.com https://www.redhat.com/mailman/listinfo/libvir-list